<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<!-- author 创建者 -->
		<meta name="author"  content="张洋,马老师" />
		<!-- 描述 -->
		<meta name="description" content="java,前端,html,head等学习~" />
		<!-- 关键字 -->
		<meta name="keywords" content="html,javascirpt,css" />
		<!-- seo -->
		<!-- 自动刷新/跳转页面 -->
		<!-- <meta http-equiv="refresh" content="5;http://www.mashibing.com" /> -->
		<!-- 缓存相关 -->
		<meta http-equiv="Pragma" content="no-cache" />
		<meta http-equiv="Cache-Control" content="no-cache" />
		<meta http-equiv="expires" content="0" />
		
		<style>
			button {
				color: #ff0000;
				font-size: 20px;
			}
		</style>
		
		<script>
			function clk(){
				alert("别点我！");
			}
		</script>
	</head>
	<body>
		<button onclick="javascript:clk();">点我呀</button>
	</body>
</html>
